Fountain pen



Jan. 2s, 1927. 41,615,312

J. c.' PoETz- FOUNTAIN PEN Filed Nov. 14,4 1925 Patented Jan. 25, 1927.

Eliefern ATEfS `JOHN CARL fronrz, or naciera, amino.

1 FOUNTAIN Application VAfiled. November L4. 1925. 'Serial No. 69,040.

age is avoided and the iil'lingidevice is well sealed for use of thepen, .andgthe parts may readily-be -manipulated in the fillingoperation. The fountain pen as constructedaccording to my invention iscomprised of a practical mini-mum number of parts7 .is durable, and maybe manufactured aft a comp aratively `lo-vv .cost of production. I

,The invention consists 1n certain novel features of construction andcombinations and arrangements-of parts in the filling device of thevpen-as will hereinafter `be more fully set ,forth and claimed.

In the accompanying drawings I have illustrated onecomplete example ofthephysivrcal.embodiment of my invention wherein the parts are combinedand arranged in accordance ,with the best mode 1 have thus Yfar devisedfor the practical application of the principles of any invention.

Figure 1 is a vertical longitudinal section of the pen with some partsin elevation, showing the parts in normal position with the pen filled.

' Figure 2 is an enlarged sectional view showing the plug-handlewithdrawn as when filling the pen, and in closed dotted position.

Figure 3 is a detail sectional view at line 3-3 of Fig. 2.

In the preferred form of my invention as illustrated in the drawingsutilize a cylindrical barrel 1 of suitable material and size to which isattached the head 2 of the pen which is provided with the usual penpoint 3. The feed of ink from the barrel to the pen point is throughducts 4 in the head 2, and the barrel is also filled, by suction,through these ducts when the head of the pen is immersed in the supplyof ink.

The pen is filled with ink through the manipulation of a reciprocablepiston 6 which conforms to the cylindrical interior of the barrel and isdesigned to be reciprocated therein, first to force out any ink that mayremain in the barrel for cleansing purposes, and then to draw in a freshsupply of ink through the ducts 4 by the action of suction; The 4pistonis `provifled with -an annula'rexterior 4groove 7 inwhich a packing ring'-7 is located to prevent passage of ink along the piston surface, .andAa rubber gasket 8 is also attached yto Ethe piston vfor -contactwiththe inner wall ofjthe cylinder or :barrel Lto prevent leaks.

The gasket l,is :secured on the end of the rpiston lby means of a -metalplate or retainer F9, `and the Vplate and 'gasket are fastened -to thepiston by means of a si-iita-blenumber of screws or pins 10 lwhichpass-through' the plate gasket andare lsecuredy in the piston. y

`In :its normal position at the upper Aend-of the barrel, the piston lisheld against rotation ztheren'by 'the co-action -of an exteriorlongitudinal vgroove orsocket `11, and a retaining pin 1,2, the latter:fixed inthe wall of the barreland projecting radially ftherein tooccupy the space of the groove v11. Wfl-n Figure E2 it will be seen thatthe groove eX- tends through a `portion of the piston and alsothroughfthe gasket yand its retaining plate to lpermit `the piston to bepushed o-r moved from its normal position in full lines Figure .2 to itsdott-ed position in thisfligure.

The lretaining upin however prevents the pis- 'ton from :being )pulledupward :to the eX- treme upper open end of the barrel.

The piston is provided with a central longitudinal opening toaccommodate its detachable stem 13 which is supported therein undernormal conditions as indicated in Figure 1. At its inner end the stem isfashioned with an enlarged head 14 which is threaded at 15 to engagecomplementary threads in a socket 15 of the piston. I At the junction ofthe head with its stem a conical valve portion 16 is provided whichengages a complementary seat 17 fashioned in the longitudinall openingof the piston, to prevent passage of ink through the piston.

At its outer end the stem is provided with a plug-handle or knob 18having a socket therein for the end of the stem, and the plughandle orknob is secured on the stem by means of a transversely extendingretaining pin 19.

To insure a close fitof the plug-handle within the upper end of thebarrel, the plug is cut away, grooved, or undercut as at 20, and ashoulder 21 is thus formed on the plug to engage'over the end of thebarrel. By this means of' the annular groove on the plug and itsshoulder, the plug, in normal position is rigidly retained within theend of the barrel by the frictional engagement of the plug and barrel,and the stem which is rigid with the plug is maintained in its normalposition of Figure 1.

As an additional means for securing a leak-proof joint of the stem inthe piston, the plug-handle is fashioned with a central boss 22 which,when in normal position tits neatly into a central opening 23 in themetal retaining plate 9 and bears against the eX- posed central portionof the rubber gasket 8 to compress the latter about the stem.

In Figure l the pen is illustrated as sunstantially filled with ink andwith its parts in position for use. Vhen the'pen'is empty and the supplyof ink is to be replenished,

the plug-handle is grasped by the lingers and thumb and pulled from theend of the barrel. thus pulling the head ofthe stem into the socket ofthe piston. Then the stem is rotated to engage the threads of the headin the threaded socket, the pin 12 and groove 1l cio-acting to preventturning of the piston. After the head is screwed into the piston andthus attached thereto, the piston is pushed down in the barrel bypressure on the plug-handle to eject air and any ink remaining in thebarrel through the ducts 4L of the pen-head. Then by reversing themovement of the piston by a pulling action on the plug handle, and withthe pen head immersed in an ink supply, it will be appar ent that asupply of ink is drawn by suction into the barrel for filling the same.After the barrel has been filled and with the piston retained againstrotation in its normal position of Fig. 2 the plug handle is turned tounscrew the head 14 from the piston and the stem is then pushed intonormal position of Figure l. In this position the plug handle closes theupper end of the barrel and makes a tight joint between the stem andpiston to prevent leaks.

I-Iaving thus fully described my invention, what I claim as new anddesire to secure by Letters Patent is- 4l. The combination with a barrelhaving a laterally projecting retaining pin therein and a piston havingan exterior transverse groove for co-action therewith, of a stem andmeans for detachably connecting said stem and piston, a gasket and anopen center retaining plate on the piston, a plug handle on the stemadapted to seat in the end of the barrel, and a boss on saidplug-handle-adapt ed to seat rwithin the retaining ring for enn gagementwith said gasket.

2. In a fountain pen, the combination with aV piston having an exterior,transverse groove, a central threaded socket and an alined openingthrough the piston, of a barrel having a laterally projecting retainingpin therein for co-action with the groove of the piston, a stemreciprocable in the piston and an enlarged threaded head on the stem forengagement with said socket, a gasket and an open center retaining plateon the piston, a plug handle on the stem adapted to seat in the end ofthe barrel, and a boss on the plug handle adapted to seat within theretaining ring for engagement with said socket.

In testimony whereof I affix my signature.

J OI-IN CARL POETZ.

